Now these have been common creatures in world of Warcraft and lord of the rings

-Appearance of some orcs-
In popular culture (including fantasy fiction and games), orcs are variously portrayed but tend towards the descriptions originally set down by Tolkien. They are of approximately human shape (with bowed legs and long arms) and of varying size. Orcs are generally ugly and filthy, with prominent fangs and facial features tending toward the grotesque (generally a mixture of the ape-like and pig-like). Their skin is typically a shade of green, grey, black, brown, or sometimes red or sandy tan (Tolkien, in contrast, described some as "sallow", some as "black"—not necessarily a reference to skin colour—and one as "black-skinned").

Orcs are aggressive scavengers and opportunistic carnivores (with a taste for both in-species cannibalism and human flesh). While possessing a low cunning and crude culture of their own, they are generally portrayed as a subject race used as soldiers (or battle fodder) by beings of greater power and intelligence. There are exceptions, as orcs sometimes have cunning leaders of their own species, such as Azog from the Lord of the Rings universe. Violent by nature, they will fight ferociously if compelled or directed by a guiding will, but tend towards more chaotic behaviour (including cowardice) if left to their own devices. They often use boars, wolves, wargs, and other unusual beasts for battle transport.

-Etymology-
The modern use of the English term orc to denote a race of evil, humanoid creatures has its inception with J. R. R. Tolkien. Tolkien's earliest Elvish dictionaries include the entry Ork (orq-) "monster", "ogre", "demon", together with orqindi and "ogresse". Tolkien sometimes used the plural form orqui in his early texts.

Tolkien sometimes, particularly in The Hobbit, used the word goblin instead of orc to describe the creatures. He notes that "orc" is "usually translated" as "goblin". In The Lord of the Rings, "goblin" is also used as an alternative to "orc", particularly in chapters describing events from a hobbit's perspective. Thus, the Uruk-hai of Isengard and the Mordor orc-captain Grishnakh are described as both "orcs" and "goblins" in The Lord of the Rings. Later in his life, Tolkien expressed an intention to change the spelling to ork, but the only place where that spelling occurred in his lifetime was in the published version of The Adventures of Tom Bombadil, in the poem Bombadil Goes Boating: "I'll call the orks on you: that'll send you running!" In The Silmarillion, published posthumously, "orcs" was retained.

-now this is what world of Warcraft have seen them use their orcs-
Orcs are one of the most important races in the Warcraft computer game series. Originally presented as a race of typically savage monsters, more recent Warcraft games have revised their image into that of "savage but noble" warriors and shamans. Orcs originally hailed from the world of Draenor until the majority of the clans were tricked into serving a force of world-destroying demons, named the Burning Legion. Under the Legion's influence, the Orcish Horde slaughtered their onetime allies the Draenei and then were mystically transported to Azeroth to conquer it in the Legion's name. After two devastating wars, the orcs were finally defeated by the Human Alliance and rounded up into internment camps. They remained there until a young orc who had been raised by humans named Thrall (birth name Go'el), rallied them together and freed the bulk of the Horde from the influence of the demons. Thrall then founded a new Horde on the principles of strength and honor, hoping to reclaim the orcs' noble heritage.

Warcraft orcs are humanoid, but prodigiously muscled, with broad noses and distinctive tusked mouths. There are many tribes of Orc, each one being specialized: Frostwolves serves as cavalry with their dire wolves, while the Shadowmoon clan provides powerful shamans. The Orcs originally had brown skin, but demonic corruption turned it green, and further demonic influence can turn it red. Male Orcs are significantly larger than humans, around 6.5 feet (2.0 m) tall when standing straight, however most male Orcs have a hunched back. Females, which first appeared as playable characters in World of Warcraft, are slightly larger than a human female and while much more slender than their male counterparts, are nonetheless well-muscled. The tusks of female orcs are very small, and are arguably more exaggerated canines than tusks. Orc warriors wear little armor but have horned helmets and carry wielding axes. Warcraft is one of the few settings in which orcs are not inherently evil and, after significant plot developments in the latest Warcraft games, can even be heroic. One could consider the orcs to be unfairly treated by humans and not only misunderstood, but vilified. The humans' enmity and prejudice towards the Orcs can be traced back to the first and second invasions and could be partially justified, as it was orcs under the control of the Burning Legion that invaded. Despite the best efforts of reformist orcs (such as Thrall) to usher in an era of peace between humans and orcs, humankind's suspicions towards the orcs are further exacerbated by the bellicose and expansionist attitudes of parts of orc society, such as the Warsong Clan, who encroach upon the ancestral territories of the Night Elves, the allies of the humans. Thrall's orcs have occasionally formed successful alliances with humans.

Their political standpoint in the Warcraft universe is set as being the leading race of the Horde, an association of races created to promote mutual survival. The trolls, a similar race in the game, partially live in the same area as the orcs and are also scattered around Azeroth, where most live in the wilderness.

In Heroes of the Storm, Blizzard MOBA game, players can control several Orc heroes from Warcraft universe such as Thrall, Garrosh, Gul'dan, and Rehgar.